820-3115 - Cleaned up after Liquid Damage but corroded pads remained

Hi,

I spilled my well deserved after-work beer while cleaning with the tube of my vacuum (d'oh) over my Macbbook and it turned off immediately.

Much sad.

I disassambled it immediately und pulled off the battery.

I cleaned it with a soft ESD-Safe brush and lots and lots of Isopropyl.

The result is not very promising - or is it?

May I turn it on without damaging it more? Should I sell it as it is?

I have a hobbyists hot air station (Uvistar 858D) and as well a soldering iron (ZD-937), but I am not good at SMD-Soldering. Anything I could & should try with this equipment?

Why are the pads turning copper? Did I brush too hard and ripped them off or is it a chemical reaction?

I did not dare to turn it on after cleaning. What would you do?

I have seen ultrasonic cleaners on ebay for 70€ - 80 Watts and 40kHz - cheaper than going to a repair service. Good idea or too late for my board?

Greetings!

Jonas